Most of us usually focus on a particular way of doing things. Instead, it's more productive to understand why you are doing something and then smarter, more elegant options begin to appear. Multitasking leads to narrow thinking, as in "I have to do this, and I have to do that, and they are separate things." It is much more productive to think about what must get done, then to plan your actions as a whole.
Stop worrying about feeling productive. We often multitask because it feels good: “I’m getting so many things done at once!” However, if we really want to be productive, it is best to settle on getting one thing done well -; and choosing that one thing wisely.